OK class, last time we talked about Q switches. Today lets discuss low impedance PUPS and bandwidth. We know that Alembics use low impedance PUPS. Why is this an advantage and what does high/low impedance really mean? Alembics are described as having a greater bandwidth. Is that because of the low impedance PUPS? I assume greater bandwith means that it is capturing a greater frequency spectrum, thus more overtones? I found this blurb: The fact that real baseband systems have both negative and positive frequencies can lead to confusion about bandwidth, since they are sometimes referred to only by the positive half, and one will occasionally see expressions such as B = 2W, where B is the total bandwidth, and W is the positive bandwidth. For instance, this signal would require a lowpass filter with cutoff frequency of at least W to stay intact. I have no freakin idea what that means, but I noticed that it mentioned: ...a lowpass filter was needed...to stay intact. Is this why Alembic circuitry is designed with a low pass filter? Bob, I expect diagrams.
